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United States Patent | 5,571,397 |
Weber | November 5, 1996 |
A boron nitride ceramic is used as a high temperature gasket material to prevent gas leakage between an exhaust gas oxygen sensor and the exhaust system of an internal combustion engine.
Inventors: | Weber; David C. (Toledo, OH) |
Assignee: | Ford Motor Company (Dearborn, MI) |
Appl. No.: | 498446 |
Filed: | July 5, 1995 |
Current U.S. Class: | 204/428; 106/33; 123/672; 204/425; 204/427; 501/96.1 |
Intern'l Class: | G01N 027/26 |
Field of Search: | 204/425,427,428 501/96,97 106/33 123/672 |
4609454 | Sep., 1986 | Ziegler | 204/428. |
4717464 | Jan., 1988 | Oshima et al. | 204/428. |
4842713 | Jun., 1989 | Stahl | 204/428. |
5031445 | Jul., 1991 | Kato et al. | 204/427. |
5089133 | Feb., 1992 | Kato et al. | 73/23. |
5128286 | Jul., 1992 | Funayama et al. | 501/97. |
5228975 | Jul., 1993 | Yamada et al. | 204/424. |